Continuous heating-furnace



l. S. WORTH.

APPLICATION FILED mmzo, 1919.

Patented Apr. 5, 1921.

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' connmuous HEATING FURNACE.

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I I Z I I I I I I 3 3 I 2 I I I 2 I I 3 M v N WN J. S. WORTH.

CONTINUOUS HEATING FURNACE. APPLICATION FHED MARZO, 1919.

1,874, 1 82;. Patented Apr. 5, 1921.

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CONTINUOUS HEATING-FURNACE.

To all whom it may concern Be it known that I JOHN My invention relatesto certain improvements in continuous, furnaces for heating billets,plates, &c. I

, One objectof the invention is to improve the construction of furnaces,of this type by usinga continuous beam, or a series of beams, extendingthroughthe'furnace and r havin means for cooling the beams.

line 22, Fig. 1; and 1 A urther object of the invention is toprovide/means for liftin the beams, said means being entirely outside-ofthe furnace. The invention also relate to details described hereinafter.

By Jny improved construction a higher heat-can .be attained than inordinary furnaces of this type; I a

In the accompanying drawings:

'Figure 1 is a longitudinal sectional-view heating furnace on thelineFig. 2 is a'sectional plan view on the 'Fi 3 is a transverse sectionalview on p the line 3- -3, Fi

l. Referring to tlie drawing's,.1'is the furnace supported on arches 2,which may form part of aregenerating structure soas 1 to heat thefurnace to the properdegree. 2

is is the bed of the furnace having a series of i longitudinal slots 3therein extending the full length of the furnace; Mounted in each ofthese slots is a rectangular hollow beam 4, in the present instance,although the ,cross section of the beam may be varied, as de-' sired.The beam is ofjgreater length thanthe furnace and projects from bothends-ofthe furnace structure 1, as clearly shown in Fig. 1. These beamsl'carry .on their upper surface fire brick 5, or other eguivalentmaterial for protecting the beams. These-fire brick also form acontinuation of the fixed uninterrupted hot. surface.

stated above, are hollow and are connected. to circulating pipes-at eachend, as at 6 and bottom of the furnace so as to provide an The beams, as

I S. WORTH, a' citizen of the United tates, and a resident- PAT NTOFFICE. I

ro-woa'rn BROS., or i I Specification of Letters Fatent; Patented Apr.5,1921. Application filed March 20, 1919.. Seria1 N o.283,6$"/ I '7communicating with a water supply system, or an air supply system, sothat the beams can be cooled by the circulation of water or air. In-thepresent instance, there are four beams in the furnace. and .they'extendbeyond each end thereof. I locate on the outside of the furnace at eachendliftingv means andT'also provide means at one end of the furnace forreciprocating the beams so that a billet, or. plate, mounted on a beam,or I beams, at one end of-the furnace will be car-.

Tied-into the furnace and intermittently fed through the furnaceanddiScharged at the opposite endwll have shown four beams di- Eachshaftismdapted to suitable bearings.

On the shafts-are arms '9"carrying rollers 8 flanged, in the presentin'stance; 1 Th? rol lers are located under the b ea 1ns','*as-show-n,"so that any rotary'motion impartedlo'the shaft will raise. the beams "sothat their ;When -a longitudinal movement is imparted to the beam,orbeams, the billet, or plate,

will lie-moved forward and when-the beams recede the billet, or plate,will rest again on the bottom of the furnace in an advanced position.

' upper surfaces will be abovethe bottom of Each shaftllO' has an towhich is attached a rod 12 connected to a crosshea'd ofa piston rodadapted'to a cylinder 13, In

order that the shaft 10, opposite its shaft 10, maybeturnedsimultaneousl'ywith the shaft, 1 provide the shaft 10 with an arm 14:

and the shaft 10 with an arm 15. The two arms are connected by rods 16located on the outside of'the furnace-, as shown in Fig. 2.

In order to counterbalance the beams to a certain extent, I-secure-tothe-shafts 10 and 10 arms 17 having'counterbalance weights 18. The beamsare reciprocated by double acting cylinders. 20.

In the present ill-.- stance, .the rod 21 is connected by a link 22 toa' lever. 23 pivoted at the base and slotted at its upper end to receivea pin 24:, which is attached to the two beams H; By this construction,the beams can raised and lowv ingots, or plates, are placed in position,preferably so as to be supported by, at least, two beams 41 when thebeams are elevated; The billets areplaced' on the ends of the beams onthe outside of the furnace and when motion is imparted to the shafts 10and 10 the beams and billets are carried into the furnace'and depositedon the bottom thereof and are progressively fed through the,

furnace as the beams are reciprocated. The several billets inside ofthe" furnace are also moved forward. The first billet is discharged at.the opposite end of the furnace. The beams, which are hollow, arecooled by the circulation of water, or air, and thus the furnace can bebrought to a higher heat than where the operating mechanism is locatedwithin the furance. Furthermore, there is no liability of the mechanismbreaking down, due to the high heat. In case of any trouble,'access canbe readily had to the mechanism. V

As each of the beams has its upper surface covered with fire brick, orlike material, the entire bottom of the furnace is kept hot and there isno likelihood of the beams warping, or sagging, due to excessive heatandthe weight of the material. means may be provided for conveying thematerial to the beams and carrying thefmaterial away fronr the furnace,depending considerablygupnn the further. treatment of the material. If,for instance,- the blbomfor billet, is to be rolled, then the rollertable or .the mill may be'extended so as to receive the bloom, orbillet, as it is discharged from y the furnace. While I have showna'double furnace inwhichlthere are two sets of beams,

independently operated, these beams may be connected so as to operate inunison, if desired, in which case there'w'ill be a single shaft at eachend instead of the two shafts shown.- The capacity of the furnace willdepend entirely upon' the material to be treated. v

I claim:

r 1. The combination in acontinuous heating furnace, of a furnacestructure; a beam Any suitable ried by the arm means for turning the twoshafts in unison so as to, raise the beanri; a pivoted lever at one'endof the shaft and connected to the beam; and means for moving. said leverto reciprocate the'beam. so that material placed on the beam will beintermittently fed through the furnace.

2. The combination in a continuous heatof beams extending;longitudinallyof the furnace and projecting at each end thereof; a transverse shaft ateach end, ofthe furnace; arms secured to the shaft for raising a seriesof longitudinal slots in the bed thereof; a beam located in each slotand extending beyond each end of the furnace, said beams being arrangedin pairs; two trans verse shafts,one beyond each end of the furnace;arms on the two shafts located under the beams; means for'connecting theshafts so that they will operate in unison, said connection belng outsde of the furnace; power mechanism for operating the shafts so as toraise the beams above the bed of thefurnace; a slotted lever engaging apin on each pair of beams; and a cylinder connected to each lever soasto move the beams in one directo return them when lowered.

4. The combination of a furnace having. a bed, longitudinal slots in thebed; a longitudinal beam in each slot, said beams extend ing furnace, ofa furnace structure; a series I @011 when they are in the raisedposition and ing beyond the ends of the furnace; a transverse shaftbeyond each end of thelfurnace and on the outside thereof; an arm oneach shaft having rollersarranged to engage the underside of the beamand raise it above the bottom of the bead; a counterbalance mountedonthe shafts and engaging oneend of a beam; and means for reciprocatingthe lever so that the beam can be raised as it moves in one direction,or can be raised when moved in the opposite direction to reverse thefeed of the material traveling through the furnace. I

ln-witness whereof I affix my signature f JOHN s. WORTH. a

